57-553: The Cadillac STS (an initialism of Seville Touring Sedan ) is a mid-sized luxury 4-door sedan manufactured and marketed by General Motors from 2004 to 2011 for the 2005 to 2011 model years. A version of the STS was marketed in China as the SLS through 2013. It was equipped with a six-speed automatic transmission with performance algorithm shifting and driver shift control. The STS
114-515: A lane departure warning system developed by Mobileye , a blind spot monitoring system , and an improved version of GM's StabiliTrak stability control system, which could operate the steering system in addition to the brakes to help correct a skid. Options previously limited to the V8 model (such as HID headlamps and Automotive head-up display ) were available with the V6 . The 2008 Cadillac STS debuted at
171-412: A supercharger compresses the intake gas, forcing more air into the engine in order to produce more power for a given displacement . The current categorization is that a supercharger is a form of forced induction that is mechanically powered (usually by a belt from the engine's crankshaft ), as opposed to a turbocharger , which is powered by the kinetic energy of the exhaust gases. However, up until
228-405: A 13.2 second quarter mile time. The STS-V's primary visual difference from the standard STS was a wire mesh grille and a 'power-dome' hood as well as six lug wheels normally seen only on larger SUVs, trucks and pickups. In addition to the grille, the front differences include the bumper, the fog light and turning signal cluster, and the hood which is slightly domed to fit over the supercharger . In
285-526: A car’s exhaust note, while a supercharged engine maintains the louder exhaust note of a normally aspirated car. Turbocharged engines are more prone to heat soak of the intake air (since turbocharging can place the hot exhaust components near the intake air system), although this can be overcome through the use of an intercooler . The majority of aircraft engines used during World War II used mechanically driven superchargers because they had some significant manufacturing advantages over turbochargers. However,
342-523: A dynamic compressor are: Common methods of driving a supercharger include: Fuels with a higher octane rating are better able to resist autoignition and detonation . As a result, the amount of boost supplied by the superchargers could be increased, resulting in an increase in engine output. The development of 100-octane aviation fuel, pioneered in the USA in the 1930s, enabled the use of higher boost pressures to be used on high-performance aviation engines and
399-415: A limiting factor in engine performance. Extreme temperatures can cause pre-ignition or knocking , which reduces performance and can cause engine damage. The risk of pre-ignition/knocking increases with higher ambient air temperatures and higher boost levels. Turbocharged engines use energy from the exhaust gas that would normally be wasted, compared with a supercharger which mechanically draws power from
456-573: A narrow range of load/speed/boost, for which the system must be specifically designed. Positive displacement pumps deliver a nearly fixed volume of air per revolution of the compressor (except for leakage, which typically has a reduced effect at higher engine speeds). The most common type of positive-displacement superchargers is the Roots-type supercharger . Other types include the rotary-screw , sliding vane and scroll-type superchargers. The rating system for positive-displacement superchargers
513-476: A nominal 150-octane rating. Using such fuels, aero engines like the Rolls-Royce Merlin 66 and Daimler-Benz DB 605 DC produced power outputs of up to 2,000 hp (1,500 kW). One disadvantage of forced induction (i.e. supercharging or turbocharging) is that compressing the intake air increases its temperature. For an internal combustion engine, the temperature of the intake air becomes
570-505: A total displacement of 426 cu in (7.0 L)). However, because 6–71 is the engine's designation rather than that of the blower, the actual displacement of the blower is less; for example, a 6–71 blower pumps 339 cu in (5.6 L) per revolution. Other supercharger manufacturers have produced blowers rated up to 16–71. Dynamic compressors rely on accelerating the air to high speed and then exchanging that velocity for pressure by diffusing or slowing it down. Major types of
627-476: A two-stage inter-cooled supercharger with a more compact layout. Nonetheless, turbochargers were useful in high-altitude bombers and some fighter aircraft due to the increased high altitude performance and range. Turbocharged piston engines are also subject to many of the same operating restrictions as those of gas turbine engines. Turbocharged engines also require frequent inspections of their turbochargers and exhaust systems to search for possible damage caused by
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#1732772439336684-445: Is less commonly used in the 21st century, as manufacturers have shifted to turbochargers to reduce fuel consumption and increase power outputs. There are two main families of superchargers defined according to the method of gas transfer: positive displacement and dynamic superchargers. Positive displacement superchargers deliver an almost constant level of boost pressure increase at all engine speeds, while dynamic superchargers cause
741-430: Is that the intake air is warmer than at high altitude. Warmer air reduces the threshold at which engine knocking can occur, especially in supercharged or turbocharged engines. Methods to cool the intake air at ground level include intercoolers/aftercoolers , anti-detonant injection , two-speed superchargers and two-stage superchargers. In supercharged engines which use a carburetor , a partially-open throttle reduces
798-417: Is too large for the engine displacement. For this reason, supercharged engines are common in applications where throttle response is a key concern, such as drag racing and tractor pulling competitions. A disadvantage of supercharging is that the engine must withstand the net power output of the engine plus the power to drive the supercharger. Additionally, turbochargers provide sound-dampening properties to
855-557: Is usually based on their capacity per revolution . In the case of the Roots blower, the GMC rating pattern is typical. The GMC rating is based on how many two-stroke cylinders - and the size of those cylinders - that it is designed to scavenge , with GMC's model range including 2–71, 3–71, 4–71 and 6–71 blowers. The 6–71 blower, for example, is designed to scavenge six cylinders of 71 cu in (1.2 L) each, resulting in an engine with
912-663: The 1925 Delage , and the 1926 Bugatti Type 35C . Amongst the most famous supercharged cars is the Bentley 4½ Litre ("Blower Bentley"), which was introduced in 1929. In 1935, the development of screw-type superchargers reached a milestone when Swedish engineer Alf Lysholm patented a design for a rotary-screw compressor with five female and four male rotors. In the 21st century, supercharged production car engines have become less common, as manufacturers have shifted to turbocharging to achieve higher fuel economy and power outputs. For example, Mercedes-Benz's Kompressor engines of
969-662: The Ford LTD II and the Plymouth Fury . A comparison test by Popular Science of four intermediate sedans (the 1976 AMC Matador, Chevrolet Malibu , Ford Torino, and Dodge Coronet ) predicted that these will be the "big cars of the future." By 1978, General Motors made its intermediate models smaller. New "official" size designations in the U.S. were introduced by the EPA , which defined market segments by passenger and cargo space. Formerly mid-sized cars that were built on
1026-602: The Lockheed Constellation , and the C-124 Globemaster II . In the 1985 and 1986 World Rally Championships, Lancia ran the Delta S4 , which incorporated both a belt-driven supercharger and exhaust-driven turbocharger. The design used a complex series of bypass valves in the induction and exhaust systems as well as an electromagnetic clutch so that, at low engine speeds, a boost was derived from
1083-491: The Northstar V8, producing 469 hp (350 kW) and 439 lb⋅ft (595 N⋅m). This engine is mated to a driver-adjustable GM automatic transmission with two shifting modes, larger brakes by Brembo , larger 10 spoke alloy wheels (18"x8.5" front, 19"x9.5" rear), Pirelli run-flat tires , a faster steering ratio, and a stiffer suspension than the standard STS. The engine block and cylinder heads are aluminum,
1140-476: The camshafts are cast iron, and the crankshaft is forged steel. Suspension is fully independent and there are four settings for the traction control system and stability control . Also different from the standard STS, the STS-V has a cooler for the rear differential oil located on the underside of the car behind the 3rd member. The STS-V had a 0-60 mph (97 km/h) acceleration time of 4.6 seconds and
1197-528: The gas turbine and a pre-turbine section of the exhaust system. The size of the ducting alone was a serious design consideration. For example, both the F4U Corsair and the P-47 Thunderbolt used the same radial engine , but the large barrel-shaped fuselage of the turbocharged P-47 was needed because of the amount of ducting to and from the turbocharger in the rear of the aircraft. The F4U used
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#17327724393361254-398: The 1.6 litre Mercedes 6/25 hp and 2.6 litre Mercedes 10/40 hp , both of which began production in 1923. They were marketed as Kompressor models, a term which was used for various models until 2012. Supercharged racing cars from around this time included the 1923 Fiat 805-405 , the 1923 Miller 122 the 1924 Alfa Romeo P2 , the 1924 Grand Prix season car from Sunbeam,
1311-488: The 2.8-liter LP1 V-6, 3.6 LY7 V-6 and the 4.6-liter Northstar V-8 as in the STS V-8 from 2007 to 2009. The 3.6 liter LLT engine was available from 2010 to 2011 until it was replaced by the 2.0 liter LDK and the 3.0 liter LF1 V6 for 2011 to 2013 models. The Chinese-Spec SLS received a facelift at the end of 2009, and was sold as a 2010 model year. The grille, bumper and many other details were revised. It
1368-625: The 2007 New York Auto Show . A 2010 update for the STS removed the GM badges, although early 2010 models still retained GM badging. For 2011, the V8 was dropped from the Cadillac STS lineup. The Cadillac STS-V is a high-performance executive car of the V-Series introduced at the 2005 Detroit Auto Show , and was available for sale in late 2005. The STS-V uses a supercharged 4.4 L version of
1425-471: The German engines being significantly larger in displacement. Two-stage superchargers were also always two-speed. After the air was compressed in the low-pressure stage , the air flowed through a heat exchanger (" intercooler ") where it was cooled before being compressed again by the high-pressure stage and then possibly also aftercooled in another heat exchanger. While superchargers were highly used in
1482-707: The STS, effectively succeeded it. Mid-size car Mid-size —also known as intermediate —is a vehicle size class which originated in the United States and is used for cars larger than compact cars and smaller than full-size cars . "Large family car" is a UK term and a part of the D-segment in the European car classification. Mid-size cars are manufactured in a variety of body styles, including sedans , coupes , station wagons , hatchbacks , and convertibles . Compact executive cars can also fall under
1539-403: The STS. All engine models feature dual overhead camshafts with variable valve timing . Remote ignition is standard. Overall length was down 5" to 196.3", yet wheelbase grew by 4" to 116.4 in (2,957 mm), resulting in increased interior space. A heads-up display was optional, as was a 300-watt Bose stereo system with MP3 capability. Base pricing at launch ranged from US$ 40,575 for
1596-550: The Seville's high-performance Magnetic Ride Control suspension. The Cadillac STS was assembled at GM's Lansing Grand River facility in Lansing, Michigan along with the smaller CTS sedan. Available engines were a 3.6 L High Feature LY7 V6 with 255 hp (190 kW) and 252 lb⋅ft (342 N⋅m) and the 4.6 L Northstar LH2 V8 which puts out 320 hp (240 kW) and 315 lb⋅ft (427 N⋅m) in
1653-623: The Spitfire and Hurricane planes powered by the Rolls-Royce Merlin engine were equipped largely with single-stage and single-speed superchargers. In 1942, two-speed two-stage supercharging with aftercooling was applied to the Rolls Royce Merlin 61 aero engine. The improved performance allowed the aircraft they powered to maintain a crucial advantage over the German aircraft they opposed throughout World War II, despite
1710-436: The United States patented the design for an air mover for use in blast furnaces and other industrial applications. This air mover and Birmingham's ventilation compressor both used designs similar to that of the later Roots-type superchargers . In March of 1878, German engineer Heinrich Krigar obtained the first patent for a screw-type compressor. The design was a two-lobe rotor assembly with identically-shaped rotors, however
1767-513: The V6 model to US$ 47,025 for the V8. The STS for model year 2008 received minor exterior revisions, including a larger grille and chrome fender vents. The interior received revised materials and a new steering wheel. The standard powertrain was a direct-injected 3.6 L V6 mated to a six-speed automatic transmission , which in the STS produced 302 hp (225 kW) and 272 lb⋅ft (369 N⋅m) of torque. Optional safety features included
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1824-403: The air density at 30,000 ft (9,100 m) is 1 ⁄ 3 of that at sea level, resulting in 1 ⁄ 3 as much fuel being able to be burnt in a naturally aspirated engine, therefore the power output would be greatly reduced. A supercharger/turbocharger can be thought of either as artificially increasing the density of the air by compressing it or as forcing more air than normal into
1881-649: The benefit to the operational range was given a much higher priority to American aircraft because of a less predictable requirement on the operational range and having to travel far from their home bases. Consequently, turbochargers were mainly employed in American aircraft engines such as the Allison V-1710 and the Pratt & Whitney R-2800 , which were comparably heavier when turbocharged, and required additional ducting of expensive high-temperature metal alloys in
1938-433: The boost pressure to rise exponentially with engine speed (above a certain threshold). Another family of supercharger, albeit rarely used, is the pressure wave supercharger . Roots blowers (a positive displacement design) tend to be only 40–50% efficient at high boost levels, compared with 70-85% for dynamic superchargers. Lysholm-style blowers (a rotary-screw design) can be nearly as efficient as dynamic superchargers over
1995-410: The cylinder every time the piston moves down on the intake stroke. Since a supercharger is usually designed to produce a given amount of boost at high altitudes (where the air density is lower), the supercharger is often oversized for low altitude. To prevent excessive boost levels, it is important to monitor the intake manifold pressure at low altitude. As the aircraft climbs and the air density drops,
2052-503: The design did not reach production. Also in 1878, Scottish engineer Dugald Clerk designed the first supercharger which was used with an engine. This supercharger was used with a two-stroke gas engine. Gottlieb Daimler received a German patent for supercharging an internal combustion engine in 1885. Louis Renault patented a centrifugal supercharger in France in 1902. The world's first series-produced cars with superchargers were
2109-780: The early 2000s (such as the C 230 Kompressor straight-four, C 32 AMG V6, and CL 55 AMG V8 engines) were replaced around 2010 by turbocharged engines in models such as the C 250 and CL 65 AMG models. However, there are exceptions, such as the Audi 3.0 TFSI supercharged V6 (introduced in 2009) and the Jaguar AJ-V8 supercharged V8 (upgraded to the Gen III version in 2009). In the 1930s, two-speed drives were developed for superchargers for aero engines providing more flexible aircraft operation. The arrangement also entailed more complexity of manufacturing and maintenance. The gears connected
2166-412: The engine. Therefore turbocharged engines usually produce more power and better fuel economy than supercharged engines. However, turbochargers can suffer from turbo lag (especially at lower RPM), where the exhaust gas flow is initially insufficient to spin the turbocharger and achieve the desired boost level, thus leading to a delay in the throttle response . This is often a result of a turbo charge which
2223-768: The extreme heat and pressure of the turbochargers. Such damage was a prominent problem in the early models of the American Boeing B-29 Superfortress high-altitude bombers used in the Pacific Theater of Operations during 1944–45. Turbocharged piston engines continued to be used in a large number of postwar airplanes, such as the B-50 Superfortress , the KC-97 Stratofreighter , the Boeing 377 Stratocruiser ,
2280-525: The full-size cars of a decade or so ago ... best sellers include Ford Torino , Chevrolet Chevelle , AMC Matador , Plymouth Satellite ..." The domestic manufacturers began changing the definition of "medium" as they developed new models for an evolving market place. A turning point occurred in the late 1970s, when rising fuel costs and government fuel economy regulations caused all car classes to shrink, and in many cases to blur. Automakers moved previously "full-size" nameplates to smaller platforms such as
2337-444: The mid-1900s and during WWII , they have largely fallen out of use in modern piston-driven aircraft . This can largely be attributed to the higher temperature and lighter alloys that make turbochargers more efficient than superchargers, as well as the lower maintenance due to less moving parts. Due to the reduced air density at higher altitudes, supercharging and turbocharging have often been used in aircraft engines. For example,
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2394-406: The mid-20th century, a turbocharger was called a "turbosupercharger" and was considered a type of supercharger. The first supercharged engine was built in 1878, with usage in aircraft engines beginning in the 1910s and usage in car engines beginning in the 1920s. In piston engines used by aircraft, supercharging was often used to compensate for the lower air density at high altitudes. Supercharging
2451-522: The mid-size category. The automobile that defined this size in the United States was the Rambler Six that was introduced in 1956, although it was called a "compact" car at that time. Much smaller than any standard contemporary full-size cars, it was called a compact to distinguish it from the small imported cars that were being introduced into the marketplace. By the early 1960s, the car
2508-606: The mid-size market for decades. Mid-size cars were the most popular category of cars sold in the United States, with 27.4 percent during the first half of 2012, ahead of crossovers at 19 percent. The United States Environmental Protection Agency (EPA) Fuel Economy Regulations for 1977 and Later Model Year (dated July 1996) includes definitions for classes of automobiles. Based on the combined passenger and cargo volume, mid-size cars are defined as having an interior volume index of 110–119 cu ft (3.1–3.4 m ). Supercharged In an internal combustion engine ,
2565-414: The mid-size market segment as the line of cars themselves kept increasing in size. By 1965, these GM "A platform" mid-size models matched the size of 1955 full-size cars. During the 1970s, the intermediate class in the U.S. was generally defined as vehicles with wheelbases between 112 inches (2,845 mm) and 118 inches (2,997 mm). Once again, the cars grew and by 1974 they were "about as large as
2622-544: The rear, the bumper is different from the standard STS and includes a wire mesh insert at the bottom which is made of the same mesh material used in the front grille. The rear spoiler is taller and wider, and encompasses the third brake light. For the interior, the STS-V also has upgraded leather and suede trim contracted from the German company Dräxlmaier , whose prior credit includes the Maybach 57 and 62 . Interior color choices were Ebony and Gray, both of which are offered on
2679-679: The same platform, like the AMC Matador sedan, had a combined passenger and cargo volume of 130 cubic feet (3.68 m ), and were now considered "full-size" automobiles. Cars that defined the mid-size market in the 1980s and 1990s included the Chrysler K-Cars ( Dodge Aries and Plymouth Reliant ), the Ford Taurus , and the Toyota Camry , which was upsized into the midsize class in 1991. The Taurus and Camry came to define
2736-573: The standard STS as well, and a two-tone Ebony/Tango Red scheme which was unique to the STS-V. Production numbers The model was discontinued in 2009. The Chinese market received the Cadillac SLS (for Seville Luxury Sedan) in November 2006 for the 2007 model year. It was assembled by Shanghai GM . Compared to the STS, the SLS has a longer wheelbase, unique interior appointments, and a near-identical exterior appearance. Engine choices included
2793-452: The supercharger to the engine using a system of hydraulic clutches, which were initially manually engaged or disengaged by the pilot with a control in the cockpit. At low altitudes, the low-speed gear would be used, to prevent excessive boost levels. At higher altitudes, the supercharger could be switched to a higher gear to compensate for the reduced intake air density. In the Battle of Britain
2850-500: The supercharger. In the middle of the rev range, a boost was derived from both systems, while at the highest revs the system disconnected the drive from the supercharger and isolated the associated ducting. This was done in an attempt to exploit the advantages of each of the charging systems while removing the disadvantages. In turn, this approach brought greater complexity and affected the car's reliability in WRC events, as well as increasing
2907-457: The throttle can be progressively opened to obtain the maximum safe power level for a given altitude. The altitude at which the throttle reaches full open and the engine is still producing full rated power is known as the critical altitude . Above the critical altitude, engine power output will reduce as the supercharger can no longer fully compensate for the decreasing air density. Another issue encountered at low altitudes (such as at ground level)
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#17327724393362964-546: The weight of engine ancillaries in the finished design. Twincharged engines have occasionally been used in production cars, such as the 2005-2013 Volkswagen 1.4 litre and the 2017-present Volvo B4204T43/B4204T48 2.0 litre four-cylinder engines. In 1849, G. Jones of Birmingham, England began manufacturing a lobe pump compressor to provide ventilation for coal mines. In 1860, the Roots Blower Company (founded by brothers Philander and Francis Marion Roots) in
3021-495: Was available in 5 trim levels known as: 2.8 Elite, 2.8 Luxury, 3.6 Elite, 3.6 Luxury and 4.6 Flagship. The SLS was priced from 448,000RMB to 828,000RMB ($ 94,835 to $ 175,160 US - August 2022 exchange rate). GM discontinued the production of the SLS in February 2013. The final STS was assembled on May 4, 2011. The enlarged third generation rear-wheel drive CTS sedan introduced in 2013 as a 2014 model, similar in size and price to
3078-568: Was given an overall "Good" score in the Insurance Institute for Highway Safety frontal crash test and an "Acceptable" rating in the side impact test. In the side impact test injury measurements to the driver's pelvis was rated "Poor" and for the torso "Acceptable." The front wheel drive Seville model name was retired in 2004, succeeded by an entirely new "STS" based on the rear wheel drive GM Sigma platform . The first Cadillac sedan to be offered with All wheel drive , it retained
3135-513: Was renamed the Rambler Classic and while it retained its basic dimensions, it was now competing with an array of new "intermediate" models from General Motors, Ford, and Chrysler. The introduction of the 1962 Ford Fairlane was viewed by consumers as too close to the compact Falcon in size and performance as well as too close to the full-sized Ford models in price. It was the introduction of General Motors " senior compacts " that grew
3192-665: Was the successor to the Cadillac Seville , which beginning in 1987 was available as an upscale performance-oriented STS (for Seville Touring Sedan ) version. While smaller than the full-size DTS , the more expensive STS was the flagship sedan of the Cadillac brand. The Cadillac STS was rated with a four star frontal and five star rear passenger crash test rating from the National Highway Traffic Safety Administration . It
3249-567: Was used to vastly increase the power output for several speed record airplanes. Military use of high-octane fuels began in early 1940 when 100-octane fuel was delivered to the British Royal Air Force fighting in World War II. The German Luftwaffe also had supplies of a similar fuel. Increasing the octane rating became a major focus of aero engine development for the remainder of the war, with later fuels having up to
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